How to bypass SSL error CefSharp WinForms

问题

I'm using CefSharp.WinForms for developing an application. When there is any SSL Certificate Error occurs it won't display web page. Can any one tell me how can i bypass SSL Certificate Error and display the web page.

回答1:

Option 1 (Preferred)

Implement IRequestHandler.OnCertificateError - this method will be called for every invalid certificate. If you only wish to override a few methods of IRequestHandler then you can inherit from RequestHandler and override the methods you are interested in specifically, in this case OnCertificateError

//Make sure you assign your RequestHandler instance to the `ChromiumWebBrowser`
browser.RequestHandler = new ExampleRequestHandler();

public class ExampleRequestHandler : RequestHandler
{
    protected override bool OnCertificateError(IWebBrowser chromiumWebBrowser, IBrowser browser, CefErrorCode errorCode, string requestUrl, ISslInfo sslInfo, IRequestCallback callback)
    {
        //NOTE: We also suggest you wrap callback in a using statement or explicitly execute callback.Dispose as callback wraps an unmanaged resource.

        //Example #1
        //Return true and call IRequestCallback.Continue() at a later time to continue or cancel the request.
        //In this instance we'll use a Task, typically you'd invoke a call to the UI Thread and display a Dialog to the user
        Task.Run(() =>
        {
            //NOTE: When executing the callback in an async fashion need to check to see if it's disposed
            if (!callback.IsDisposed)
            {
                using (callback)
                {
                    //We'll allow the expired certificate from badssl.com
                    if (requestUrl.ToLower().Contains("https://expired.badssl.com/"))
                    {
                        callback.Continue(true);
                    }
                    else
                    {
                        callback.Continue(false);
                    }
                }
            }
        });

        return true;

        //Example #2
        //Execute the callback and return true to immediately allow the invalid certificate
        //callback.Continue(true); //Callback will Dispose it's self once exeucted
        //return true;

        //Example #3
        //Return false for the default behaviour (cancel request immediately)
        //callback.Dispose(); //Dispose of callback
        //return false;
    }
}

---

Option 2

Set CefSettings.IgnoreCertificateErrors

var settings = new CefSettings()
{
    IgnoreCertificateErrors = true
};

Cef.Initialize(settings);

• WPF CefSettings Example
• WinForms CefSettings Example

回答2:

Copy/paste ready:

//Before instantiating a ChromiumWebBrowser object
CefSettings settings = new CefSettings();
settings.IgnoreCertificateErrors = true;
Cef.Initialize(settings);

回答3:

 public abstract class BaseRequestEventArgs : System.EventArgs
    {
        protected BaseRequestEventArgs(IWebBrowser chromiumWebBrowser, IBrowser browser)
        {
            ChromiumWebBrowser = chromiumWebBrowser;
            Browser = browser;
        }

        public IWebBrowser ChromiumWebBrowser { get; private set; }
        public IBrowser Browser { get; private set; }
    }
    public class OnCertificateErrorEventArgs : BaseRequestEventArgs
    {
        public OnCertificateErrorEventArgs(IWebBrowser chromiumWebBrowser, IBrowser browser, CefErrorCode errorCode, string requestUrl, ISslInfo sslInfo, IRequestCallback callback)
            : base(chromiumWebBrowser, browser)
        {
            ErrorCode = errorCode;
            RequestUrl = requestUrl;
            SSLInfo = sslInfo;
            Callback = callback;

            ContinueAsync = false; // default
        }

        public CefErrorCode ErrorCode { get; private set; }
        public string RequestUrl { get; private set; }
        public ISslInfo SSLInfo { get; private set; }

        /// <summary>
        ///     Callback interface used for asynchronous continuation of url requests.
        ///     If empty the error cannot be recovered from and the request will be canceled automatically.
        /// </summary>
        public IRequestCallback Callback { get; private set; }

        /// <summary>
        ///     Set to false to cancel the request immediately. Set to true and use <see cref="T:CefSharp.IRequestCallback" /> to
        ///     execute in an async fashion.
        /// </summary>
        public bool ContinueAsync { get; set; }
    }

    public class CustomRequesthandle : RequestHandler
    {
        public event EventHandler<OnCertificateErrorEventArgs> OnCertificateErrorEvent;

        protected override bool OnCertificateError(IWebBrowser chromiumWebBrowser, IBrowser browser, CefErrorCode errorCode, string requestUrl, ISslInfo sslInfo, IRequestCallback callback)
        {
            var args = new OnCertificateErrorEventArgs(chromiumWebBrowser, browser, errorCode, requestUrl, sslInfo, callback);

            OnCertificateErrorEvent?.Invoke(this, args);

            callback.Continue(true);
            return args.ContinueAsync;
        }
    }

and

 browser = new CefSharp.Wpf.ChromiumWebBrowser();
        browser.RequestHandler = new CustomRequesthandle();

来源：https://stackoverflow.com/questions/35555754/how-to-bypass-ssl-error-cefsharp-winforms